<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>数字图像处理</title>

    <!-- Bootstrap -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" rel="stylesheet">

    <!-- customize css -->
    <link href={{ url_for("static", filename="css/index.css") }} rel="stylesheet">

    <!-- HTML5 shim 和 Respond.js 是为了让 IE8 支持 HTML5 元素和媒体查询（media queries）功能 -->
    <!-- 警告：通过 file:// 协议（就是直接将 html 页面拖拽到浏览器中）访问页面时 Respond.js 不起作用 -->
    <!--[if lt IE 9]>
      <script src="https://cdn.jsdelivr.net/npm/html5shiv@3.7.3/dist/html5shiv.min.js"></script>
      <script src="https://cdn.jsdelivr.net/npm/respond.js@1.4.2/dest/respond.min.js"></script>
    <![endif]-->
</head>

<body>
    {% include "navbar.html" %}
    <div class="container">
        {% with messages = get_flashed_messages(with_categories=true) %}
        {% if messages %}
        {% for category, message in messages %}
        <div class="alert alert-{{ category }} alert-dismissible" role="alert">
            <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span
                    aria-hidden="true">&times;</span></button>
            {{ message }}
        </div>
        {% endfor %}
        {% endif %}
        {% endwith %}
        <ul class="nav nav-tabs">
            <li role="presentation" class="{% if request.path == url_for('index') %}active{% endif %}"><a
                    href="/">动作</a></li>
            <li role="presentation" class="{% if request.path == url_for('basic') %}active{% endif %}"><a
                    href="/basic">基础操作</a></li>
            <li role="presentation" class="{% if request.path == url_for('dip') %}active{% endif %}"><a
                    href="/dip">数图操作</a></li>
            <li role="presentation"><a class="btn btn-success" href="/org">原图</a></li>
        </ul>
        {% block body %}
        {% endblock %}
        </br>
        </br>
        {% if filename %}
        <div class="row">
            <div style="position: absolute; overflow: hidden;width: 1150px;" id="targetImg">
                <img src="{{ filename }}" style="width: 100%;">
            </div>
        </div>
        {% endif %}
        </br>
    </div>

    <!-- jQuery (Bootstrap 的所有 JavaScript 插件都依赖 jQuery，所以必须放在前边) -->
    <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
    <!-- 加载 Bootstrap 的所有 JavaScript 插件。你也可以根据需要只加载单个插件。 -->
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script>
    <!-- customize javascript -->
    <!-- <script src="/static/js/base.js"></script> -->
    <script>
        targetImg = document.getElementById("targetImg")

        targetImg.addEventListener("mousewheel", function (event) {
            console.log("wheel action!")
            var delta = event.wheelDelta;
            console.log((parseInt(getComputedStyle(targetImg)["width"]) + parseInt(delta / 10)) + "px");
            targetImg.style.width = (parseInt(getComputedStyle(targetImg)["width"]) + parseInt(delta / 10)) + "px";
            // targetImg.style.height = "auto";
            event.preventDefault();
        }, false);

        targetImg.onmousedown = function (event) {
            // console.log(1);
            /*再次点击时使得图标任然在那个位置，鼠标可以点击到图标上*/
            var ol = event.clientX - targetImg.offsetLeft;
            var ot = event.clientY - targetImg.offsetTop;
            event.preventDefault();
            /*鼠标点击*/
            document.onmousemove = function (event) {
                var left = event.clientX - ol;
                var top = Math.max(188, event.clientY - ot);
                targetImg.style.left = left + "px";/*赋值*/
                targetImg.style.top = top + "px";
                event.preventDefault();
            }
            /*鼠标松开*/
            document.onmouseup = function (event) {
                if (event.button == 2) {
                    event.preventDefault();
                    return;
                }
                document.onmousemove = null;
                document.onmouseup = null;
            }
        }
        function zoom_In() {
            // console.log("1");
            targetImg.style.width =
                parseInt(getComputedStyle(targetImg)["width"]) + 20 + "px";
        }
        function zoom_Out() {
            targetImg.style.width =
                parseInt(getComputedStyle(targetImg)["width"]) - 20 + "px";
        }
    </script>

</body>

</html>
